U5T1 – The Light Dependent Reactions of Photosynthesis

Name structure B

Name structure E

Which letter represents a lamella?

In the chloroplast, many chlorophyll molecules (and other pigments) are attached to protein complexes in the internal membranes, labelled 'A' on the diagram. What are these complexes called ? ( Plural please!)

What molecule is represented by 'B' on the diagram?

Which membrane is represented by 'C' on the diagram?

Which term best describes what happens to the electrons when light hits the primary pigment (or reaction centre)?

High energy' electrons leave the chlorophyll molecule: What state does that leave the chlorophyll molecule in?

What type of molecule will pick up the 'high energy' electrons in PSII?

In non-cyclic photophosphorylation, the electrons that leave the chlorophyll are replaced by the splitting of water. What is the name of this process?

The splitting of water at PSII creates molecules A & B, what do A and B represent?

Where does the energy needed for the splitting of water originate?

What type of molecule is represented by 'C'?

What is structure D?

Once light has hit structure D, and the electrons have left the chlorophyll, they can either be passed on to form F or follow path 'G'. What is path 'G'?

Why can it be advantageous to a plant for more of process 'G' to occur?

What does molecule 'H' represent?

Which chemical does 'E' represent?

Which chemical does 'F' represent?

The transfer of electrons along the carrier proteins causes hydrogen ions to be moved across the membrane, causing a proton concentration gradient. the protons than pass back through the membrane creating ATP. What is the name of this process involving using electrons to produce a concentration gradient?